Blend butter and cream cheese until smooth. Mix in flour and salt. Make into 2 logs and chill overnight. Next day, slice pastry into about 36 pieces. Press into small muffin cups. Put ½ tsp nuts in each cup. Combine sugar, corn syrup and eggs. Beat well. Stir in butter, salt and vanilla. Pour into tart shells. Sprinkle nuts on top. Bake @ 350 for 20 minutes.